Cocaine is a narcotic substance extracted from a tropical plant. It is used as a painkiller or narcotic. I know of many cases where people who have recovered from gastric anastomosis have used cocaine, leading to various health difficulties, including gastric ulcers. So I don't think you should use cocaine if you've had health problems. Despite their use in medicine, such drugs can negatively affect the body. In this fherehab.com article, you can learn more about any drugs and their acceptability of use. To avoid unnecessary problems is better to be aware of the effects of drugs beforehand. Stomach problems are no joke. Take care!